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A shared lock allows which of the following types of transactions to occur?

  • A.Delete
  • B.Insert
  • C.Read
  • D.Update

Answer: C

Correct answer: Read

A shared lock permits reading, and several transactions may hold one on the same item at the same time - reads do not interfere with each other. Any change requires an exclusive lock, which no other transaction may hold in any mode.

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